sheathing

(noun) protective covering consisting, for example, of a layer of boards applied to the studs and joists of a building to strengthen it and serve as a foundation for a weatherproof exterior. Synonyms: overlay, overlayer.

(verb) cover with a protective sheathing. Synonyms: sheathe. Example: "Sheathe her face."

(verb) enclose with a sheath. Synonyms: sheathe. Example: "Sheathe a sword."

(verb) plunge or bury (a knife or sword) in flesh. Synonyms: sheathe.